WARNING!!! 5D MK III Firmware 1.2.1 Read before installing!

Started Apr 27, 2013 | Discussions thread
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WARNING!!! 5D MK III Firmware 1.2.1 Read before installing!
Apr 27, 2013

(For anyone who uses or is considering using 3rd party batteries)

There have been a few reports from users that have updated to firmware 1.2.1 where the new firmware now restricts them from using 3rd party (non genuine) batteries.

Apparently in some cases the camera gives you a warning, and then allows you to continue to use the battery - but it won't report the battery level. (And you can't delete or register the battery in the camera)

Another has reported that their cameras refuse to use the 3rd party batteries at all / allow you to operate the camera.

And some others have been able to successfully use some 3rd party batteries.

Hope this is of some help...

Canon EOS 5D
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